Operators

 

1. Assignment

int i = 5;
i = i + 3;
i += 3;

2. Promotion

int-den daha kicik tiplerde edilen arifmetik emeliyyatlar daima int qaytarir.

int i = 5;
double d = 2.3D;
i = i + d; // Compile time error
i = (int) (i + d);

byte b1 = 8;
byte b2 = 5;
byte b3 = b1 + b2; // Because sum is int
byte b3 = (byte) (b1 + b2);

Ashagidaki numunelerde cast-a ehtiyac yoxdur, cunki cast avtomatik bash verir

int i = 5;
double d = 2.3D;
i += d;

3. Pre increment, post increment, pre decrement, post decrement

int i = 10;
i++;
System.out.println(i);
i--;
System.out.println(i);
++i;
System.out.println(i);
--i;
System.out.println(i);

int i = 10;
System.out.println(i);
System.out.println(i++);
System.out.println(++i);

int i = 10;
int j = i++;
System.out.println(i);
System.out.println(j);

int i = 10;
int j = i++;
System.out.println(i);
System.out.println(j);

j = --i;
System.out.println(i);
System.out.println(j);

int i = 10;
int j = ++i;
System.out.println(i);
System.out.println(j);

weird behaviour

int i = 0;
System.out.println(i);
i = ++i;
System.out.println(i);
i = ++i + 2;
System.out.println(i);

int i = 0;
System.out.println(i);
i = i++;
System.out.println(i);
i = i++ + 2;
System.out.println(i);

4. Unary Logical operator

boolean b1 = true;
b1 = !b1;
System.out.println(b1);

boolean a = true;
boolean b = false;
boolean c = a == b;
System.out.println(c);

5. Conditional operators

https://press.rebus.community/programmingfundamentals/chapter/logical-operators/

 if((getOne() == 2) & (getTwo() == 2)) {
        System.out.println("value1 is 1 and value2 is 2");
    }

    if((getOne() == 2) | (getTwo() == 2)) {
        System.out.println("value1 is 1 and value2 is 2");
    }
}

public static int getOne() {
    System.out.println("in getOne method");
    return 1;
}

public static int getTwo() {
    System.out.println("in getTwo method");
    return 2;
}

6. Ternary operator

int a = 1;
int b = 2;
int min = (a < b) ? a : b;
System.out.println(min);

int a = 1;
int b = 2;
System.out.println((a < b) ? "kicikdir" : "boyukdur");

7. Bitwise operators

bitwise and

int a = 4; // 0100
int b = 8; // 1000
int c = 4 & 8;
System.out.println(c);

bitwise or

int a = 4; // 0100
int b = 8; // 1000
int c = a | b;
System.out.println(c);

bitwise xor

int a = 4; // 0100
int b = 8; // 1000
int c = a ^ b;
System.out.println(c);

bitwise complementary

int a = 4; // 0100
int b = ~a;
System.out.println(b);

left shift and right shift

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Evaluation Order

int a = 6;
int b = 5;
int c = 10;
float result = a + ++b * c / a * b;
System.out.println(result);